This has been a problem for a few months but I just recently pinpointed the problem to not just using NVDA but having the NVDA setting "Visual Highlight" turned on.

The Visual Highlight setting in NVDA is very useful, both for me as an accessibility tester to have a visual reminder where I am in the document and also for recording purposes, to show others how NVDA moves through a document and announces elements.

I have tried:

• uninstalling both NVDA and Acrobat Pro and reinstalling them (after restarting my computer)

• tried both having NVDA on first then opening the PDF, and having the PDF open then turning NVDA

• using the Repair tool in Acrobat to repair the installation

I'm using an HP 14 inch laptop running Windows 11 Home 64 bit, OS build 26100.7462, 8 GB RAM, AMD Athlon Gold 3150U with Radeon Graphics processor, 238 GB storage